package com.us.core;

import java.io.File;
import java.util.Properties;

public class DelClass {
    public static void main(String[] args) {
        Properties a = System.getProperties();
        System.out.println(a.getProperty("os.user.dir"));

        System.out.println();

        // Mac OS X
        // Windows XP
        // Linux
    }
}
